Deep geothermal energy. Here's the best explanatory video I've seen: https://youtu.be/8erbvqFZ9M8?t=50
Caveat, I have no idea if these guys can do it but someone can. At this stage, it's about getting done it accurately and profitably.
https://newatlas.com/energy/quaise-deep-geothermal-drilling-...
https://www.vox.com/energy-and-environment/2020/10/21/215154...